<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>v-show指令</title>
</head>

<body>
    <div id="app">
        <input type="button" value="切换显示状态" @click="changeIsShow">
        <input type="button" value="累加年龄" @click="addAge">
        <img v-show="isShow" src="./img/monkey.gif" alt="">
        <img v-show="age>=18" src="./img/monkey.gif" alt="">
    </div>
    <!-- 1.开发环境版本，包含了有帮助的命令行警告 -->
    <script src="vue.js"></script>
    <script>
        var app = new Vue({
            el: "#app",
            data: {
                isShow: false,
                age: 17
            },
            methods: {
                changeIsShow: function() {
                    this.isShow = !this.isShow;
                },
                addAge: function() {
                    this.age++;
                }
            },
        })
    </script>
</body>

</html>